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Intake of vitamin E, vitamin C, and carotenoids and the risk of Parkinson's disease: a meta-analysis

Journal

LANCET NEUROLOGY
Volume 4, Issue 6, Pages 362-365

Publisher

LANCET LTD
DOI: 10.1016/S1474-4422(05)70097-1

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We studied the effect of vitamin C, vitamin E, and P carotene intake on the risk of Parkinson's disease (PD). We did a systematic review and meta-analysis of observational studies published between 1966 and March 2005 searching MEDLINE, EMBASE, and the Cochrane Library. Eight studies were identified (six case-control, one cohort, and one cross-sectional). We found that dietary intake of vitamin E protects against PD. This protective influence was seen with both moderate intake (relative risk 0 (.) 81, 95% CI 0(.)67-0(.)98) and high intake (0(.)78, 0(.)57-1(.)06) of vitamin E, although the possible benefit associated with high intake of vitamin E was not significant. The studies did not suggest any protective effects associated with vitamin C or P carotene. We conclude that dietary vitamin E may have a neuroprotective effect attenuating the risk of PD. These results require confirmation in randomised controlled trials.

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